#include<stdio.h>

size_t my_strlen(char* s)
{
    size_t count = 0;
    while (*s != '\0')
    {
        count++;
        s++;
    }
    return count;
}
int main()
{
    char arr[] = "abcdef";
    size_t re = my_strlen(arr);
    printf("%d", re);
    return 0;
}

//int main()
//{
//	int k = 0;
//	scanf("%d", &k);
//	char arr[] = "ABCD";
//	int sz = sizeof(arr) / sizeof(arr[0]);
//	for 
//	return 0;
//}